body {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.card {
    border: none;
    border-radius: 15px;
}

.card-header {
    background: linear-gradient(135deg, #ee3124 0%, #c92a1f 100%);
    border-radius: 15px 15px 0 0 !important;
    padding: 1.5rem;
}

.card-title {
    font-size: 2rem;
    font-weight: 700;
}

.btn-lg {
    padding: 15px 40px;
    font-size: 1.2rem;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-lg:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.btn-lg:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#message.alert {
    border-radius: 10px;
    font-weight: 500;
}

#message.alert-success {
    background-color: #d4edda;
    border-color: #c3e6cb;
    color: #155724;
}

#message.alert-danger {
    background-color: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

.card.bg-light {
    transition: transform 0.3s ease;
}

.card.bg-light:hover {
    transform: translateY(-5px);
}

.display-4 {
    font-weight: 700;
    color: #333;
}

.card-footer {
    background-color: #f8f9fa;
    border-radius: 0 0 15px 15px !important;
}

.progress {
    border-radius: 15px;
    background-color: #e9ecef;
}

.progress-bar {
    transition: width 0.6s ease;
    border-radius: 15px;
    font-weight: bold;
}